<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    :root {
      --icon-color: black;
    }

    .danger {
      --icon-color: red;
    }

    .alert {
      --icon-color: orange;
    }

    .success {
      --icon-color: green;
    }

    .icon-container {
      display: none;
    }

    .container {
      position: relative;
      text-align: center;
    }

    h2 {
      padding: 0 0.5em;
      margin-bottom: 0;
    }

    svg {
      display: inline-block;
      width: 80px;
      height: 80px;
      margin: 10px auto;
    }
  </style>
</head>
<body>
  <svg xmlns="http://www.w3.org/2000/svg" class="icon-container">
    <symbol id="close-icon" viewbox="0 0 200 200">
      <circle cx="96" cy="96" r="88" fill="none" stroke="var(--icon-color)" stroke-width="15" />
      <text x="100" y="160" fill="var(--icon-color)" text-anchor="middle" style="font-size:250px;">x</text>
    </symbol>
  </svg>

  <div class="container">
    <h2>Default Icon</h2>
    <svg role="img">
      <title>Close Dialog</title>
      <use xlink:href="#close-icon" />
    </svg>

    <div class="danger">
      <h2>Danger Icon</h2>
      <svg role="img">
        <title>Close Danger Dialog</title>
        <use xlink:href="#close-icon" />
      </svg>
    </div>

    <div class="success">
      <h2>Success Icon</h2>
      <svg role="img">
        <title>Close Success Dialog</title>
        <use xlink:href="#close-icon" />
      </svg>
    </div>

    <div class="alert">
      <h2>Alert Icon</h2>
      <svg role="img">
        <title>Close Alert Dialog</title>
        <use xlink:href="#close-icon" />
      </svg>
    </div>
</body>
</html>